A lithium ion battery electrolyte mixing kettle

Abstract

The present invention belongs to the technical field of battery production, and provides a lithium-ion battery electrolyte mixing kettle, comprising a shell, one end of which is connected to a feed pipe, a lifting plate slidably installed in the shell, the side of the lifting plate is in sliding contact with the inner wall of the shell, and a rotating power part that drives the lifting plate to move up and down is fixedly installed on the shell, so as to solve the technical problems in the prior art that the heat generated during the electrolyte mixing process is difficult to quickly remove and the cooling effect on the electrolyte is poor. When the present invention is used, the lifting plate moves downward, and when the electrolyte liquid surface contacts the horizontal section of the diverter plate, the electrolyte will form a water column injected into the diverter cavity through the through hole under the action of pressure, and the fast-moving electrolyte will collide with the bottom of the connecting tube, and the electrolyte will be dispersed and a mist-like electrolyte will be generated under the action of the collision. The present invention can be widely used in solution mixing operation scenarios.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and in particular relates to a lithium ion battery electrolyte mixing kettle. Background Art

[0002] Lithium-ion battery electrolyte is a key component for the performance of lithium-ion batteries. The quality of battery electrolyte affects battery performance and also affects the quality stability of the battery electrolyte itself. During the production of lithium-ion battery electrolyte, lithium salts, solvents, additives, etc. are mixed in a stirring kettle.

[0003] However, conventional stirring kettles are currently mostly used in the preparation of lithium-ion electrolytes, which cannot achieve rapid and uniform stirring and mixing. Since the materials of the battery electrolyte will emit heat during the mixing process, excessively high temperature will affect the quality and performance of the battery electrolyte, resulting in reduced stability of the battery. In response to the above technical problems, the applicant has retrieved some prior art, such as the Chinese patent with patent announcement number CN208426933U, which stirs the electrolyte in a cylinder during use, and a circulating coolant is arranged around the cylinder for cooling, but the coolant can only contact the cylinder wall, so that the heat in the electrolyte away from the cylinder wall is difficult to be quickly transferred to the cylinder wall, resulting in poor cooling effect on the electrolyte in the cylinder, resulting in difficulty in quickly removing the heat in the electrolyte. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium ion battery electrolyte mixing kettle, aiming to solve the technical problem in the prior art that the heat generated during the electrolyte mixing process is difficult to quickly remove and the cooling effect on the electrolyte is poor.

[0005] The present invention is implemented as follows: a lithium-ion battery electrolyte mixing kettle comprises a shell, one end of which is connected to a feed pipe, a lifting plate is slidably installed in the shell, the side of the lifting plate is in sliding contact with the inner wall of the shell, and a rotating power part for driving the lifting plate to move up and down is fixedly installed on the shell;

[0006] The lifting plate is fixedly mounted with a coaxially arranged connecting tube, the cross section of the connecting tube is an annular structure, and a through groove of an annular structure is provided in the projection area of ​​the connecting tube opening onto the lifting plate; a diverter plate is fixedly mounted on the lifting plate, the cross section of the diverter plate is an L-shaped structure and is coaxially arranged with the shell, the horizontal section of the diverter plate is fixedly connected to the inner wall of the connecting tube, the diverter plate, the lifting plate and the connecting tube surround a diverter cavity, a through hole is provided in the horizontal section of the diverter plate, a water pump is fixedly mounted on the lifting plate, the water pump draws electrolyte in the diverter cavity and transports it to the top of the lifting plate, and a plurality of drop pipes are connected to the lifting plate.

[0007] Further technical solution: a screw is rotatably installed in the shell, the screw is coaxially arranged with the shell and is rotatably connected with the lifting plate, and the rotating power part drives the screw to rotate.

[0008] Further technical solution: the through groove is an annular structure and is coaxially arranged with the shell, the inner side of the through groove is flush with the side wall of the connecting tube, and the outer side of the through groove is located in the projection area of ​​the opening of the connecting tube onto the lifting plate.

[0009] Further technical solution: the through holes are arranged to be distributed in a linear array, and the distribution direction of the through holes is along the radial direction of the shell, and a plurality of groups of through holes in a linear array are arranged on the diverter plate.

[0010] Further technical solution: Multiple groups of evenly distributed rotating shafts are rotatably installed on the horizontal section of the diverter plate, the rotating shaft passes through the top wall of the connecting cylinder and a first stirring blade and a second stirring blade are fixedly installed at both ends of the rotating shaft, multiple groups of liquid collecting cylinders coaxially arranged around the rotating shaft are fixedly installed on the top of the connecting cylinder, and multiple groups of power blades located in the liquid collecting cylinder are fixedly installed on the rotating shaft, and the electrolyte output from the water pump drives the rotating shaft to rotate through the power blades.

[0011] Further technical solution: the water pump is connected to a suction pipe and a discharge pipe, the suction pipe is connected to the diversion chamber, the discharge pipe is connected to a first connecting ring fixedly installed on the connecting tube, the first connecting ring is coaxially arranged with the connecting tube, and the first connecting ring is connected to the liquid collecting tube through a power tube.

[0012] Further technical solution: Multiple groups of cooling pipes are fixedly installed in the connecting tube, and the multiple groups of cooling pipes are distributed in a circular array around the axis of the shell, and the cooling pipes extend in the radial direction of the shell. The second connecting ring and the third connecting ring are fixedly installed on the inner and outer sides of the connecting tube, respectively, and the two ends of the cooling pipes are respectively connected to the second connecting ring and the third connecting ring, and the second connecting ring and the third connecting ring are connected to the cooling water circulation equipment main body fixedly installed on the shell.

[0013] Further technical solution: the second connecting ring and the third connecting ring are respectively connected with a water inlet pipe and a water outlet pipe, both of which are connected with the main body of the cooling water circulation equipment, the water inlet pipe and the water outlet pipe are hoses, and the second connecting ring and the third connecting ring are fixedly installed with a placement tube, and the water inlet pipe and the water outlet pipe are located in the placement tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When the lifting plate moves downward, when the electrolyte surface contacts the horizontal section of the diverter plate, it will pass through the diverter plate through the through hole. As the lifting plate descends, the lifting plate and the diverter plate will generate pressure on the liquid surface, and then the electrolyte will form a water column injected into the diverter cavity through the through hole under the action of pressure. The fast-moving electrolyte will collide with the bottom of the connecting tube, and the electrolyte will be dispersed and produce mist electrolyte under the action of the collision. After the collision, the electrolyte will disperse and move around, so that the electrolyte in different areas can contact, collide and mix, and the dispersed electrolyte and the mist electrolyte make the electrolyte more fully contact and mix, further improving the effect of electrolyte mixing. At the same time, after the electrolyte collides and disperses, the area of ​​contact between it and the air in the diverter cavity increases, so that the heat in the electrolyte can be quickly released into the air, reducing the influence of heat on the quality and performance of the electrolyte, and improving the quality of the electrolyte.

[0016] 2. The collision of the electrolyte with the bottom of the connecting tube will produce dispersed and misty electrolyte. The dispersed and misty electrolyte can fully contact the cooling tube for heat exchange. The heat in the electrolyte is brought out by the circulating cooling water to achieve heat transfer, further improve the cooling effect of the electrolyte, and avoid the electrolyte temperature being too high to affect the quality and performance of the electrolyte.

[0017] 3. After the lifting plate moves to the bottom of the shell, all the electrolytes are mixed. The lifting plate is moved upward by a set distance. At this time, the valve on the drop tube is opened, and the electrolyte on the lifting plate can drop downward to the bottom of the shell through the drop tube. The electrolyte flowing downward from the top will impact the electrolyte at the bottom of the shell, further improving the mixing effect of the electrode liquid raw materials. The electrolyte contacts the air during the downward flow. At the same time, under the action of the impact, part of the electrolyte is dispersed to increase the contact area between the air and the electrolyte, further improving the heat dissipation effect of the electrolyte.

[0018] 4. The water pump extracts the electrolyte in the diversion chamber through the suction pipe and then transports it to the first connecting ring through the discharge pipe. After that, the electrolyte enters the liquid collecting cylinder through the power pipe and flows out. When the electrolyte flows upward in the liquid collecting cylinder, the power blade drives the shaft to rotate. The rotation of the shaft causes the first stirring blade and the second stirring blade to stir the electrolyte below and above the lifting plate respectively, thereby realizing multi-mode mixing of the electrolyte and further improving the uniformity of the electrolyte material mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure inside the shell of the present invention.

[0021] Figure 3This is a schematic structural diagram of the lifting plate in the present invention from a first viewing angle.

[0022] Figure 4 It is a schematic structural diagram of the lifting plate from a second viewing angle in the present invention.

[0023] Figure 5 It is a schematic cross-sectional structural diagram of the lifting plate in the present invention.

[0024] Figure 6 for Figure 5 A magnified schematic diagram of the A1 region in the middle.

[0025] Figure 7 for Figure 5 A magnified schematic diagram of the A2 region in the middle.

[0026] Figure 8 Schematic diagram of the internal structure of the diversion cavity in the present invention.

[0027] In the attached drawings: 1. Shell; 2. Feed pipe; 3. Screw rod; 4. Lifting plate; 5. Through groove; 6. Connecting tube; 7. Diverter plate; 8. Diverter chamber; 9. Through hole; 10. Dropping tube; 11. Rotating shaft; 12. First stirring blade; 13. Liquid collecting tube; 14. Power blade; 15. Second stirring blade; 16. First connecting ring; 17. Power tube; 18. Water pump; 19. Liquid extraction tube; 20. Liquid discharge tube; 21. Cooling tube; 22. Second connecting ring; 23. Third connecting ring; 24. Water outlet pipe; 25. Water inlet pipe; 26. Placement tube; 27. Cooling water circulation equipment body; 28. Rotating power parts. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0030] like Figure 1-Figure 8 As shown, a lithium-ion battery electrolyte mixing kettle provided by the present invention comprises a shell 1, one end of the shell 1 is connected with a feed pipe 2, a lifting plate 4 is slidably installed in the shell 1, and the side of the lifting plate 4 is in sliding contact with the inner wall of the shell 1, a rotating power member 28 for driving the lifting plate 4 to move up and down is fixedly installed on the shell 1, a screw rod 3 is rotatably installed in the shell 1, the screw rod 3 is coaxially arranged with the shell 1 and the screw rod 3 is rotatably connected with the lifting plate 4, and the rotating power member 28 drives the screw rod 3 to rotate;

[0031] The lifting plate 4 is fixedly mounted with a coaxially arranged connecting tube 6, the cross section of the connecting tube 6 is an annular structure, and a through groove 5 of an annular structure is provided in the projection area of ​​the connecting tube 6 opening on the lifting plate 4. The through groove 5 is an annular structure and is coaxially arranged with the shell 1. The inner side of the through groove 5 is flush with the side wall of the connecting tube 6, and the outer side of the through groove 5 is located in the projection area of ​​the connecting tube 6 opening on the lifting plate 4. A diverter plate 7 is fixedly mounted on the lifting plate 4, and the cross section of the diverter plate 7 is an L-shaped structure and is coaxially arranged with the shell 1. The horizontal section of the diverter plate 7 is fixedly connected to the inner wall of the connecting tube 6. The diverter plate 7, the lifting plate 4 and the connecting tube 6 enclose a diverter cavity 8. The horizontal section of the diverter plate 7 is provided with through holes 9. The through holes 9 are arranged in a linear array distribution, and the distribution direction of the through holes 9 is along the radial direction of the shell 1. A plurality of groups of through holes 9 in a linear array are arranged on the diverter plate 7. A water pump 18 is fixedly installed on the lifting plate 4. The water pump 18 extracts the electrolyte in the diverter cavity 8 and transports it to the top of the lifting plate 4. The lifting plate 4 is connected to a plurality of groups of drop pipes 10.

[0032] In actual application of this embodiment, the lifting plate 4 is located at the highest point, and the electrolyte raw material is transported to the shell 1 through the feeding pipe 2. At this time, the rotating power part 28 drives the screw rod 3 to rotate so that the lifting plate 4 moves downward. When the electrolyte liquid level contacts the horizontal section of the diverter plate 7, it will pass through the diverter plate 7 through the through hole 9. As the lifting plate 4 descends, the lifting plate 4 and the diverter plate 7 will generate pressure on the liquid level, and then the electrolyte will pass through the through hole 9 under the action of pressure to form a water column injected into the diverter cavity 8. The fast-moving electrolyte will collide with the bottom of the connecting tube 6. Under the action of the collision, the electrolyte will be dispersed and a mist electrolyte will be generated. After the collision, the electrolyte will disperse and move around, so that the electrolyte in different areas can contact, collide and mix, and the dispersed electrolyte and the mist electrolyte allow the electrolyte to be more fully contacted and mixed, further improving the effect of electrolyte mixing. At the same time, after the electrolyte collides and disperses, the area of ​​contact between it and the air in the diverter cavity 8 increases, so that the heat in the electrolyte can be quickly released Put it into the air to reduce the influence of heat on the quality and performance of the electrolyte, improve the quality of the electrolyte, and the dispersed electrolyte will gather at the bottom of the shunt chamber 8. The electrolyte gathered at the bottom of the shunt chamber 8 is transported to the top of the lifting plate 4 by the water pump 18, so that the mixed and cooled electrolyte is separated from the unmixed electrolyte below. When the lifting plate 4 moves to the bottom of the shell 1, all the electrolytes are mixed, and the lifting plate 4 moves upward by a set distance. At this time, the valve on the drop pipe 10 is opened, and the electrolyte on the lifting plate 4 can fall downward to the bottom of the shell 1 through the drop pipe 10. The electrolyte flowing downward from the top will impact the electrolyte at the bottom of the shell 1, further improving the mixing effect of the electrode liquid raw materials. At the same time, under the action of the impact, part of the electrolyte is dispersed to increase the heat dissipation effect of the electrolyte. When the lifting plate 4 moves to the top of the shell 1, the above-mentioned process of the lifting plate 4 descending and rising is repeated to complete the mixing of the electrolyte, and the mixed electrolyte is discharged through the discharge pipe at the bottom of the shell 1.

[0033] In an example of this embodiment, the rotating power component 28 is a motor, and of course it can also be other components that can output rotating power, such as a hydraulic motor, etc. The motor drives the screw rod 3 to rotate, thereby adjusting the position of the lifting plate 4.

[0034] like Figure 2-Figure 7 As shown, a lithium-ion battery electrolyte mixing kettle provided by the present invention is provided, wherein a plurality of groups of evenly distributed rotating shafts 11 are rotatably installed on the horizontal section of the diverter plate 7, the rotating shaft 11 passes through the top wall of the connecting cylinder 6, and a first stirring blade 12 and a second stirring blade 15 are fixedly installed at both ends of the rotating shaft 11, a plurality of groups of liquid collecting cylinders 13 coaxially arranged around the rotating shaft 11 are fixedly installed on the top of the connecting cylinder 6, a plurality of groups of power blades 14 located in the liquid collecting cylinder 13 are fixedly installed on the rotating shaft 11, and the electrolyte output from the water pump 18 drives the rotating shaft 11 to rotate through the power blades 14.

[0035] Specifically, the water pump 18 is connected to a liquid suction pipe 19 and a liquid discharge pipe 20. The liquid suction pipe 19 is connected to the diversion chamber 8. The liquid discharge pipe 20 is connected to a first connecting ring 16 fixedly mounted on the connecting tube 6. The first connecting ring 16 is coaxially arranged with the connecting tube 6. The first connecting ring 16 is connected to the liquid collecting tube 13 through a power tube 17.

[0036] In actual application of this embodiment, the electrolyte enters the diverter chamber 8 through the through hole 9 and then flows to the bottom of the diverter chamber 8. At this time, the water pump 18 extracts the electrolyte in the diverter chamber 8 through the suction pipe 19 and then transports it to the first connecting ring 16 through the discharge pipe 20. Thereafter, the electrolyte enters the liquid collecting barrel 13 through the power pipe 17 and flows out. When the electrolyte flows upward in the liquid collecting barrel 13, the power blades 14 push the rotating shaft 11 to rotate. The rotation of the rotating shaft 11 causes the first stirring blade 12 and the second stirring blade 15 to stir the electrolyte below and above the lifting plate 4 respectively, thereby improving the uniformity of the electrolyte material mixing.

[0037] like Figure 5 , Figure 8 As shown, a lithium-ion battery electrolyte mixing kettle provided by the present invention is provided, wherein a plurality of groups of cooling tubes 21 are fixedly installed in the connecting cylinder 6, and the plurality of groups of cooling tubes 21 are distributed in a circular array around the axis of the shell 1, and the cooling tubes 21 extend along the radial direction of the shell 1, and a second connecting ring 22 and a third connecting ring 23 are fixedly installed on the inner and outer sides of the connecting cylinder 6, respectively, and both ends of the cooling tube 21 are respectively connected to the second connecting ring 22 and the third connecting ring 23, and the second connecting ring 22 and the third connecting ring 23 are connected to a cooling water circulation device main body 27 fixedly installed on the shell 1.

[0038] Specifically, the second connecting ring 22 and the third connecting ring 23 are respectively connected to the water inlet pipe 25 and the water outlet pipe 24, and the water inlet pipe 25 and the water outlet pipe 24 are both connected to the cooling water circulation equipment main body 27. The water inlet pipe 25 and the water outlet pipe 24 are hoses, and the second connecting ring 22 and the third connecting ring 23 are fixedly installed with a placement tube 26, and the water inlet pipe 25 and the water outlet pipe 24 are located in the placement tube 26.

[0039] In actual application of this embodiment, the cooling water circulation device body 27 conveys cooling water to the second communication ring 22 through the water inlet pipe 25, and the cooling water enters the cooling pipe 21 from the second communication ring 22 and flows into the third communication ring 23. Then, the cooling water in the third communication ring 23 returns to the cooling water circulation device body 27 through the water outlet pipe 24, thereby realizing the circulation of cooling water in the cooling pipe 21.

[0040] When the electrolyte passes through the through hole 9 upward, the electrolyte will be quickly injected into the connecting tube 6 due to the pressure, and then the fast-moving electrolyte will collide with the bottom of the connecting tube 6, and then the electrolyte will be dispersed under the action of the collision and a mist electrolyte will be generated. After the collision, the electrolyte will disperse and flow around, so that the electrolytes in different areas can contact, collide and mix, and the dispersed electrolyte and the mist electrolyte allow the electrolyte to contact and mix more fully, further improving the effect of electrolyte mixing;

[0041] At the same time, the dispersed and mist-like electrolyte can also fully contact the cooling tube 21 for heat exchange. The heat in the electrolyte is taken out by the circulating cooling water to achieve heat transfer, further improving the cooling effect on the electrolyte and avoiding the high temperature of the electrolyte affecting the quality and performance of the electrolyte. The dispersed electrolyte then gathers at the bottom of the diversion chamber 8.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A lithium-ion battery electrolyte mixing kettle, comprising a housing (1), one end of the housing (1) being connected to a feed pipe (2), characterized in that: A lifting plate (4) is slidably mounted in the shell (1), the side of the lifting plate (4) is in sliding contact with the inner wall of the shell (1), and a rotating power member (28) is fixedly mounted on the shell (1) to drive the lifting plate (4) to move up and down; The lifting plate (4) is fixedly mounted with a coaxially arranged connecting tube (6), the cross section of which is an annular structure, and a through groove (5) of an annular structure is provided in the projection area of ​​the connecting tube (6) opening onto the lifting plate (4); a diverter plate (7) is fixedly mounted on the lifting plate (4), the cross section of which is an L-shaped structure and is coaxially arranged with the housing (1), the horizontal section of the diverter plate (7) is fixedly connected to the inner wall of the connecting tube (6), the diverter plate (7), the lifting plate (4) and the connecting tube (6) enclose a diverter cavity (8), the horizontal section of the diverter plate (7) is provided with a through hole (9), a water pump (18) is fixedly mounted on the lifting plate (4), the water pump (18) extracts electrolyte in the diverter cavity (8) and transports it to the top of the lifting plate (4), and the lifting plate (4) is connected to a plurality of groups of drop pipes (10); A plurality of groups of cooling tubes (21) are fixedly installed in the connecting tube (6), the plurality of groups of cooling tubes (21) are distributed in a circular array around the axis of the shell (1), the cooling tubes (21) extend in the radial direction of the shell (1), a second connecting ring (22) and a third connecting ring (23) are fixedly installed on the inner and outer side surfaces of the connecting tube (6), two ends of the cooling tube (21) are respectively connected to the second connecting ring (22) and the third connecting ring (23), and the second connecting ring (22) and the third connecting ring (23) are connected to a cooling water circulation device body (27) fixedly installed on the shell (1); The second connecting ring (22) and the third connecting ring (23) are respectively connected to a water inlet pipe (25) and a water outlet pipe (24); the water inlet pipe (25) and the water outlet pipe (24) are both connected to a cooling water circulation device body (27); the water inlet pipe (25) and the water outlet pipe (24) are hoses; and a placement tube (26) is fixedly mounted on the second connecting ring (22) and the third connecting ring (23); the water inlet pipe (25) and the water outlet pipe (24) are located inside the placement tube (26); when the lifting plate (4) descends, the electrolyte is injected into the diversion cavity (8) through the through hole (9), collides with the bottom of the connecting tube (6) to be dispersed, and contacts the cooling tube (21).

2. A lithium-ion battery electrolyte mixing kettle according to claim 1, characterized in that: A screw rod (3) is rotatably mounted in the housing (1); the screw rod (3) and the housing (1) are coaxially arranged and the screw rod (3) is rotatably connected to the lifting plate (4); and the rotating power member (28) drives the screw rod (3) to rotate.

3. A lithium ion battery electrolyte mixing kettle according to claim 1, characterized in that: The through groove (5) is an annular structure and is arranged coaxially with the housing (1); the inner side surface of the through groove (5) is flush with the side wall of the connecting tube (6); and the outer side surface of the through groove (5) is located within the projection area of ​​the opening of the connecting tube (6) onto the lifting plate (4).

4. A lithium ion battery electrolyte mixing kettle according to claim 1, characterized in that: The through holes (9) are arranged to be distributed in a linear array, and the distribution direction of the through holes (9) is along the radial direction of the shell (1), and a plurality of groups of through holes (9) in a linear array are arranged on the splitter plate (7).

5. A lithium ion battery electrolyte mixing kettle according to claim 1, characterized in that: A plurality of evenly distributed rotating shafts (11) are rotatably mounted on the horizontal section of the diverter plate (7); the rotating shafts (11) penetrate the top wall of the connecting cylinder (6); and a first stirring blade (12) and a second stirring blade (15) are fixedly mounted on both ends of the rotating shaft (11); a plurality of liquid collecting cylinders (13) coaxially arranged around the rotating shaft (11) are fixedly mounted on the top of the connecting cylinder (6); a plurality of power blades (14) located in the liquid collecting cylinder (13) are fixedly mounted on the rotating shaft (11); and electrolyte output from the water pump (18) drives the rotating shaft (11) to rotate through the power blades (14).

6. A lithium-ion battery electrolyte mixing kettle according to claim 5, characterized in that: The water pump (18) is connected to a liquid extraction pipe (19) and a liquid discharge pipe (20); the liquid extraction pipe (19) is connected to the diversion chamber (8); the liquid discharge pipe (20) is connected to a first communication ring (16) fixedly mounted on the connecting cylinder (6); the first communication ring (16) and the connecting cylinder (6) are coaxially arranged; the first communication ring (16) is connected to the liquid collecting cylinder (13) via a power pipe (17).

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